When trying to express a sense of involvement and interest, "is concerned" can feel overused and often vague. Luckily, there are a number of synonyms that can be used in its place, depending on the context and tone desired. For example, one might replace "is concerned" with "is interested in," "is invested in," "is focused on," "is committed to," or "cares about." These alternatives can help add clarity and emphasis to a sentence, and can also help to avoid repetition in writing or speaking. Ultimately, the choice of synonym will depend on the speaker or writer's style and the specific message they are trying to convey.